Pretty easy. It's very clear that they all move much better than he does on the court. It doesn't take someone with 20/20 vision to see that. Sarr is the fastest 7-footer I have ever seen. It's obvious on tape that he moves better, is more agile, changes direction better, has more vertical pop...etc.
I saw Edey's run. He runs like the clunky f***er he is on the court.